*What triggers Bruce Banner's transformation into the Hulk? Intense anger or extreme fear results in the startling metamorphosis - the matter he gets, the more powerful he becomes. Following the faithful gamma-radiation accident, it was nightfall that spurred the great change, and Banner would return to his human appearance with the rising of the sun. At first, this dual identity was successfully hidden from the world at large. But once Banner was exposed, he became a fugitive, forever seeking a cure for his unique malady. *Source:Card back